Mid-Fire Glazes
Mid-Fire Glazes
Both are certifications received from the Art and Creative Materials Institute as a result of extensive toxicological testing. AP is for products that contain no materials in sufficient quantities to be toxic or injurious to humans, including children, or to cause acute or chronic health problems. CL is for products that are labeled in accordance with the chronic hazard labeling standard and are certified to be not hazardous if used in accordance with directions on packaging.
Speedball glazes and underglazes have a shelf life of 2 years after manufacture, however when properly stored and maintained they can last much longer.
To get the best results with Mid-Fire glazes, we recommend bisque firing to cone 05/04 and doing a test tile on your clay body and preferred firing method. We do not recommend any slow controlled cools, as this can effect the final appearance of the glaze.
Yes, however the finished appearance of many of the glazes may change at higher temperatures. We recommend doing test tiles and your own dinnerware safety testing prior to use on any finished pieces.

color overview
Variegated Lapis is a gloss glaze with a bold amalgamation of dark to light shades of blue with brighter shades of seaweed green wherever it breaks. When fired at Cone 5, this glaze has deep dark steel blue tones. Variegated Lapis will assuredly make bold statements wherever it is applied.
| Cone 5 Results | Glossy, dark grey blue with steel blue variegation |
| Cone 6 Results | Glossy, rich royal blue variegation with peeks of brown where thin |
| Recommended Layers | 3 heavy coats |
| Notes | No slow cool |